Syno cats are great to have with African cichlid fish tanks. There's lots of different ones to choose from (don't know the exact name) synodontis They actually come from lake Malawi. They're a little pricey ($15-20) a piece but they are worth it. They did a great job with fry control and make a great addition to a tank.
Here's a link
thttp://www.planetcatfish.com/catelog/g ... _id=29#121
Hope this helps!